1. Asumta's family harvested 2.4 tonnes of of maize, the family sold 1.9 tonnes of maize. The rest of the maize was used for food. If the family used 12kg 500g of maize per week for how many weeks did the maize last?

2. Work out 

3. What is the average mass of a fresh egg?

4. The mean mass of 8 girls is 40kg, if the weights of 7 of them are 40 kg, 42 kg, 43 kg, 45 kg, 42 kg, and 39 kg. Calculate the mass of the eighth girl.

5. Amina bought 1.5kg of salt and 3.75kg of rice, calculate the total mass bought.

6. Humphrey's lorry was loaded with 450 cartons each containing 50 tins of fat each empty carton has a mass of 500 g and each tin of fat has a mass of 1 kg. Calculate the total mass carried by the lorry in kilograms. 

7. A detergent factory delivered 150 t of omo to a retail shop. The detergent was packed in packets containing 50kg. Calculate the number if 50 kg packets obtained. 

8. A sack holds 120 kg of beans when full. How many such sacks are needed to pack 28.60 t of beans?

9. The mean mass of a classs of 25 girls is 48.5 kg, when the mass of the teacher is addedthe mean mass becomes 51.5 kg. Calculate the mass of the teacher.

10. A big carton weighs 100 g when empty. Calculate it's total weight in kilograms if filled with 100 books each weighing 100 g.